Steep-front electric stress phenomena on the electric insulation in pulsed rotating generators incorporating fast magnetic flux compression

The effect of steep-front, very large electric stress phenomena on the dielectric insulation designs for pulsed rotating electrical generators, incorporating rapid magnetic flux compression features, powering hypervelocity electromagnetic accelerators for industrial metal deposition is of primordial importance for the insulation integrity, and could lead to a very early system failure. A transient, nonlinear electric field, Finite Element Method (FEM) has been demonstrated, in order to evaluate such complex dielectric stress occurrence. Formally and fundamentally, the magnetic flux compression rotating generators operate exclusively in fast transient regime. Transient surges appearing in the excitation generate extremely steep pulses at high frequencies, leading to high voltages in interplay with complex reflection and resonance effects in the magnetic flux compressor, hypervelocity accelerator and, due to impedance mismatch in the connections, and look amazingly similar to dielectric phenomena in electric machines, and systems struck by lightning. The large amount of data involving power systems under lightning conditions could be used as the other term in the treatment, for optimal design which represents the scope and the main contribution of this research.